Alert archive / Mississippi / Mesoscale Discussions in 2022
Mesoscale Discussion 604
The Storm Prediction Center issued this mesoscale discussion at Apr 30, 2022, 10:42 PM CDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 30, 2022, 10:42 PM CDT (03:42 UTC)
- Expired
- May 1, 2022, 12:45 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 165...166
All 51 counties
Arkansas County, AR, Ashley County, AR, Bradley County, AR, Chicot County, AR, Crittenden County, AR, Desha County, AR, Drew County, AR, Lee County, AR, Lincoln County, AR, Phillips County, AR, Union County, AR, Bienville Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, East Carroll Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Richland Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Benton County, MS, Bolivar County, MS, Carroll County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Lafayette County, MS, Leflore County, MS, Marshall County, MS, Montgomery County, MS, Panola County, MS, Quitman County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Washington County, MS, Yalobusha County, MS, Yazoo County, MS, Fayette County, TN, Shelby County, TN
The radar
The Jackson/Brandon,MS radar (KDGX), 183 km from the middle of the area, began a volume at 03:43 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Little Rock, AR (KLZK), launched 00:00Z, 3.7 hours before the alert went out and 226 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 2092 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 778 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 7.2
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 7:53 PM CDT | Mesoscale Discussion | SPC | Chicot | 97 min |
| Apr 30, 8:17 PM CDT | Severe Thunderstorm Watch | SPC | Ashley, Chicot | 6 hr |
| May 1, 8:35 AM CDT | Mesoscale Discussion | SPC | Jefferson, Lafourche, Orleans, Saint Charles, Saint James, Saint John the Baptist and 1 more | 55 min |
Nearby
Mesoscale Discussions in Mississippi, 2022Mesoscale Discussions in Louisiana, 2022Mesoscale Discussions in Arkansas, 2022Every mesoscale discussion in 2022
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.